ES1071269U - Perfected rivet (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved rivet, of the type used in the fixed joints between elements or parts such as beams, plates or the like, characterized essentially by having a rod (1) provided with a fixed head (2) round or polygonal, equipped with a double threaded: one right-handed (3) with conventional passage, and on which a right-handed nut of longitude (5) is moved, and another left-handed (4) with a pitch longer than the right-handed one, and on which a left-handed nut moves. Of small width (6), which advances along the shank quickly until it reaches the right-hand nut (5), both of which are separated by a pressure nut or a helical fastener (7). (Machine-translation by Google Translate, not legally binding)

Description

Rivet perfected.

Technical field

The object of the present invention, as expressed in the statement of this specification, does reference to an improved rivet of the type used in fixed joints between elements or parts such as beams, plates or Similar.

Background of the invention

A rivet is basically a metal stem of union or mechanical closure, elongated and equipped with a head, that a once placed in its working position through holes suitable interns previously practiced in the pieces to be joined, is undergoing the necessary treatment in order to configure another head at the opposite end of the first; in this way, the elements or pieces located between both heads are subject each.

The pieces in question are joined by the pressure exerted by both heads from the two ends of the through holes and / or by swelling of the rod inside of the hole.

Traditionally, there are rivets to be used hot (must be heated first and formed in hot) or to be used cold (made in such a way and / or based on some metal so soft, that it can be shaped into cold).

However, these types of rivets Traditional have some drawbacks.

The hot rivet features two specific inconveniences; the first is precisely that must be preheated to high temperatures before being conformed; the second consists in the fact that it must be formed before cooling down, forcing the operator to act quickly; also, in hot riveting, they are usually two operators are needed, one to hold the rivet and another to rivet it.

Likewise, both hot rivets and cold also present another common drawback: the rivet does not It is removable, which means that to remove it you have to break it or cut it, and therefore, it is not easily removable nor is it reusable

As an alternative, there is the option to use a screw with two nuts, threadable both in the same direction as turn, so that, keeping the first fixed, supporting the second on the first and pressing on the second, this last locks the first in position.

However, this last method also presents an inconvenience, derived from its mode of use; when desired position and lock a standard screw in one position determined by using two nuts, must be placed and screw a first nut to the exact point where it you want to block this and then it must be placed and screwed a second nut until it rests on the first and press on she; both nuts, while the operator tries to fix them, move over the screw thread in the same direction as turn; when the second nut manages to "hunt" and press the first to block it in a certain position, which it happens is that the first nut is pressing with one side of its filleting against the opposite side of the filleting of screw, while the second nut is pressing with the side opposite the filleting of the first nut against the other screw thread side; precisely the inconvenience of This method consists in that, if during the fixing process, the operator does not hold the first nut properly while threading the second, whether you hold it at its point of attachment against the sheet metal or whether you hold it with your own fingers or with any auxiliary tool, when trying to screw the second nut on the first, the latter pushes the first in it direction of rotation, with which, the two rotate at the same time; in these circumstances, the second nut is hardly able to "hunt" at first and, therefore, is unable to perform firm pressure on her; so, you can't block your turn.

Description of the invention

In order to overcome these inconveniences, it has designed the new perfected rivet, object of the Present technical report.

Generally speaking, the present invention will be refers to a new rivet that has several advantages with respect to the traditional ones; first, being a rivet in cold, it can be placed by a single operator and does not require any rushing assembly. On the other hand, the new rivet is easy and fully removable as well as reusable.

The new device is essentially constituted by a stem with a fixed head at one of its ends, which It can be round or even polygonal, equipped with a double thread, one levógiro and another dextrógiro.

The dextrógira thread is of conventional passage, and on it a dextrógira nut of great width moves. This nut is pressure, and through it the rivet is fastened exercising its fixing function.

The levógira thread is much longer than the dextrógira, and on it a levógira nut of small width, which advances through the stem quickly until reach the dextrógira nut, immobilizing it without needing Pressure.

Preferably, between both nuts it is placed a pressure washer or a helical fixer, which will immobilize totally the position of both on the stem without any help outer element. In this way it is possible to place a rivet with a high tolerance, for example in anticipation of dilatation, or when said rivet acts as a fixing and turning axis of a joint.

The use of the new rivet is very simple; first the rod is placed through the holes of the pieces or elements to join, until the head of the same stop with the first piece to join; then the thread is placed dextrógira until you encounter the opposite piece, applying the pair of desired tightening for a correct connection between both pieces; then a pressure washer or a fixator is placed helical, and finally, the levógira nut is placed, making it Fast forward until you encounter the dextrógira nut, not being it is necessary to exert a great tightening torque, just the right one to the correct action of the pressure washer or fixer helical.

Description of the drawings

In order to illustrate how much so far we have exposed, is accompanied by the present specification and forming an integral part of it, of a set of drawings in those that have been represented in a simplified and schematic way, a practical embodiment example only explanatory and not limiting the practical possibilities of the invention.

Figure 1 shows an exploded profile of the novel rivet.

Figure 2 shows a view, in profile, of the rivet mounted.

Description of a practical example

The new perfected rivet is conformed by a rod (1) with a round fixed head (2) in one of its ends, the rod being provided with a double threaded (3 and 4), one dextrógiro (3) for threading and another levógiro (4) for counter, so that this arrangement allows the placement of a dextrógira nut (5) and a levógira nut (6) separated by a pressure washer (7); So, for your advance by the rod, its turn must be the opposite of the one with respect to the other.

The countersunk (4) is of greater step than the threaded (3).

The nut (5) is, in turn, thicker than the locknut (6).

They will be independent of the purpose of this invention the materials used in the manufacture of different elements that compose it, as well as the forms, dimensions and accessories that may present, and may be replaced by other technically equivalent ones, provided that no affect the essentiality of it or depart from the scope defined in the claims section.

Established the expressed concept, it is written to then the note of claims, thus synthesizing the news that you want to claim.

Claims (1)

1. Improved rivet, of the type used in fixed joints between elements or parts such as beams, plates or the like, essentially characterized by having a rod (1) provided with a fixed or round head (2) round or polygonal, equipped with a double threaded: one dextrógiro (3) of conventional passage, and on which a dextrógira nut of great width (5), and another levógiro (4) of longer passage than the dextrógiro, and on which a levógira nut moves of small width (6), which advances rapidly through the rod until it reaches the dextrógira nut (5), both being separated by a pressure nut or a helical fastener (7).